Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2000-2001 Qualcomm Incorporated | |
ce5706bd | 4 | Copyright (C) 2009-2010 Gustavo F. Padovan <gustavo@padovan.org> |
5d8868ff | 5 | Copyright (C) 2010 Google Inc. |
1da177e4 LT |
6 | |
7 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License version 2 as | |
11 | published by the Free Software Foundation; | |
12 | ||
13 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
14 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
15 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
16 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
17 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
18 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
20 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
21 | ||
22 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
23 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
24 | SOFTWARE IS DISCLAIMED. | |
25 | */ | |
26 | ||
27 | #ifndef __L2CAP_H | |
28 | #define __L2CAP_H | |
29 | ||
30 | /* L2CAP defaults */ | |
47ec1dcd | 31 | #define L2CAP_DEFAULT_MTU 672 |
f2fcfcd6 | 32 | #define L2CAP_DEFAULT_MIN_MTU 48 |
47ec1dcd | 33 | #define L2CAP_DEFAULT_FLUSH_TO 0xffff |
1c2acffb | 34 | #define L2CAP_DEFAULT_TX_WINDOW 63 |
e90bac06 | 35 | #define L2CAP_DEFAULT_MAX_TX 3 |
fa235562 | 36 | #define L2CAP_DEFAULT_RETRANS_TO 2000 /* 2 seconds */ |
e90bac06 | 37 | #define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ |
db12d647 | 38 | #define L2CAP_DEFAULT_MAX_PDU_SIZE 1009 /* Sized for 3-DH5 packet */ |
c1b4f43b | 39 | #define L2CAP_DEFAULT_ACK_TO 200 |
1890d36b | 40 | #define L2CAP_LOCAL_BUSY_TRIES 12 |
1da177e4 | 41 | |
4e8402a3 MH |
42 | #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ |
43 | #define L2CAP_INFO_TIMEOUT (4000) /* 4 seconds */ | |
1da177e4 LT |
44 | |
45 | /* L2CAP socket address */ | |
46 | struct sockaddr_l2 { | |
47 | sa_family_t l2_family; | |
8e036fc3 | 48 | __le16 l2_psm; |
1da177e4 | 49 | bdaddr_t l2_bdaddr; |
f29972de | 50 | __le16 l2_cid; |
1da177e4 LT |
51 | }; |
52 | ||
53 | /* L2CAP socket options */ | |
54 | #define L2CAP_OPTIONS 0x01 | |
55 | struct l2cap_options { | |
56 | __u16 omtu; | |
57 | __u16 imtu; | |
58 | __u16 flush_to; | |
59 | __u8 mode; | |
fcc203c3 | 60 | __u8 fcs; |
68d7f0ce | 61 | __u8 max_tx; |
14b5aa71 | 62 | __u16 txwin_size; |
1da177e4 LT |
63 | }; |
64 | ||
65 | #define L2CAP_CONNINFO 0x02 | |
66 | struct l2cap_conninfo { | |
67 | __u16 hci_handle; | |
68 | __u8 dev_class[3]; | |
69 | }; | |
70 | ||
71 | #define L2CAP_LM 0x03 | |
72 | #define L2CAP_LM_MASTER 0x0001 | |
73 | #define L2CAP_LM_AUTH 0x0002 | |
74 | #define L2CAP_LM_ENCRYPT 0x0004 | |
75 | #define L2CAP_LM_TRUSTED 0x0008 | |
76 | #define L2CAP_LM_RELIABLE 0x0010 | |
77 | #define L2CAP_LM_SECURE 0x0020 | |
78 | ||
79 | /* L2CAP command codes */ | |
47ec1dcd MH |
80 | #define L2CAP_COMMAND_REJ 0x01 |
81 | #define L2CAP_CONN_REQ 0x02 | |
82 | #define L2CAP_CONN_RSP 0x03 | |
83 | #define L2CAP_CONF_REQ 0x04 | |
84 | #define L2CAP_CONF_RSP 0x05 | |
85 | #define L2CAP_DISCONN_REQ 0x06 | |
86 | #define L2CAP_DISCONN_RSP 0x07 | |
87 | #define L2CAP_ECHO_REQ 0x08 | |
88 | #define L2CAP_ECHO_RSP 0x09 | |
89 | #define L2CAP_INFO_REQ 0x0a | |
90 | #define L2CAP_INFO_RSP 0x0b | |
91 | ||
92 | /* L2CAP feature mask */ | |
93 | #define L2CAP_FEAT_FLOWCTL 0x00000001 | |
94 | #define L2CAP_FEAT_RETRANS 0x00000002 | |
95 | #define L2CAP_FEAT_ERTM 0x00000008 | |
96 | #define L2CAP_FEAT_STREAMING 0x00000010 | |
97 | #define L2CAP_FEAT_FCS 0x00000020 | |
98 | #define L2CAP_FEAT_FIXED_CHAN 0x00000080 | |
99 | ||
100 | /* L2CAP checksum option */ | |
101 | #define L2CAP_FCS_NONE 0x00 | |
102 | #define L2CAP_FCS_CRC16 0x01 | |
1da177e4 | 103 | |
1c2acffb GP |
104 | /* L2CAP Control Field bit masks */ |
105 | #define L2CAP_CTRL_SAR 0xC000 | |
106 | #define L2CAP_CTRL_REQSEQ 0x3F00 | |
107 | #define L2CAP_CTRL_TXSEQ 0x007E | |
108 | #define L2CAP_CTRL_RETRANS 0x0080 | |
109 | #define L2CAP_CTRL_FINAL 0x0080 | |
110 | #define L2CAP_CTRL_POLL 0x0010 | |
111 | #define L2CAP_CTRL_SUPERVISE 0x000C | |
112 | #define L2CAP_CTRL_FRAME_TYPE 0x0001 /* I- or S-Frame */ | |
113 | ||
114 | #define L2CAP_CTRL_TXSEQ_SHIFT 1 | |
115 | #define L2CAP_CTRL_REQSEQ_SHIFT 8 | |
8f17154f | 116 | #define L2CAP_CTRL_SAR_SHIFT 14 |
1c2acffb GP |
117 | |
118 | /* L2CAP Supervisory Function */ | |
119 | #define L2CAP_SUPER_RCV_READY 0x0000 | |
120 | #define L2CAP_SUPER_REJECT 0x0004 | |
121 | #define L2CAP_SUPER_RCV_NOT_READY 0x0008 | |
122 | #define L2CAP_SUPER_SELECT_REJECT 0x000C | |
123 | ||
124 | /* L2CAP Segmentation and Reassembly */ | |
125 | #define L2CAP_SDU_UNSEGMENTED 0x0000 | |
126 | #define L2CAP_SDU_START 0x4000 | |
127 | #define L2CAP_SDU_END 0x8000 | |
128 | #define L2CAP_SDU_CONTINUE 0xC000 | |
129 | ||
1da177e4 LT |
130 | /* L2CAP structures */ |
131 | struct l2cap_hdr { | |
8e036fc3 AV |
132 | __le16 len; |
133 | __le16 cid; | |
66c853cc | 134 | } __packed; |
1da177e4 LT |
135 | #define L2CAP_HDR_SIZE 4 |
136 | ||
137 | struct l2cap_cmd_hdr { | |
138 | __u8 code; | |
139 | __u8 ident; | |
8e036fc3 | 140 | __le16 len; |
66c853cc | 141 | } __packed; |
1da177e4 LT |
142 | #define L2CAP_CMD_HDR_SIZE 4 |
143 | ||
144 | struct l2cap_cmd_rej { | |
8e036fc3 | 145 | __le16 reason; |
66c853cc | 146 | } __packed; |
1da177e4 LT |
147 | |
148 | struct l2cap_conn_req { | |
8e036fc3 AV |
149 | __le16 psm; |
150 | __le16 scid; | |
66c853cc | 151 | } __packed; |
1da177e4 LT |
152 | |
153 | struct l2cap_conn_rsp { | |
8e036fc3 AV |
154 | __le16 dcid; |
155 | __le16 scid; | |
156 | __le16 result; | |
157 | __le16 status; | |
66c853cc | 158 | } __packed; |
1da177e4 | 159 | |
8db4dc46 GP |
160 | /* channel indentifier */ |
161 | #define L2CAP_CID_SIGNALING 0x0001 | |
162 | #define L2CAP_CID_CONN_LESS 0x0002 | |
163 | #define L2CAP_CID_DYN_START 0x0040 | |
164 | #define L2CAP_CID_DYN_END 0xffff | |
165 | ||
1da177e4 | 166 | /* connect result */ |
47ec1dcd MH |
167 | #define L2CAP_CR_SUCCESS 0x0000 |
168 | #define L2CAP_CR_PEND 0x0001 | |
169 | #define L2CAP_CR_BAD_PSM 0x0002 | |
170 | #define L2CAP_CR_SEC_BLOCK 0x0003 | |
171 | #define L2CAP_CR_NO_MEM 0x0004 | |
1da177e4 LT |
172 | |
173 | /* connect status */ | |
47ec1dcd MH |
174 | #define L2CAP_CS_NO_INFO 0x0000 |
175 | #define L2CAP_CS_AUTHEN_PEND 0x0001 | |
176 | #define L2CAP_CS_AUTHOR_PEND 0x0002 | |
1da177e4 LT |
177 | |
178 | struct l2cap_conf_req { | |
8e036fc3 AV |
179 | __le16 dcid; |
180 | __le16 flags; | |
1da177e4 | 181 | __u8 data[0]; |
66c853cc | 182 | } __packed; |
1da177e4 LT |
183 | |
184 | struct l2cap_conf_rsp { | |
8e036fc3 AV |
185 | __le16 scid; |
186 | __le16 flags; | |
187 | __le16 result; | |
1da177e4 | 188 | __u8 data[0]; |
66c853cc | 189 | } __packed; |
1da177e4 | 190 | |
5dee9e7c MH |
191 | #define L2CAP_CONF_SUCCESS 0x0000 |
192 | #define L2CAP_CONF_UNACCEPT 0x0001 | |
193 | #define L2CAP_CONF_REJECT 0x0002 | |
194 | #define L2CAP_CONF_UNKNOWN 0x0003 | |
1da177e4 LT |
195 | |
196 | struct l2cap_conf_opt { | |
197 | __u8 type; | |
198 | __u8 len; | |
199 | __u8 val[0]; | |
66c853cc | 200 | } __packed; |
1da177e4 LT |
201 | #define L2CAP_CONF_OPT_SIZE 2 |
202 | ||
589d2746 | 203 | #define L2CAP_CONF_HINT 0x80 |
47ec1dcd | 204 | #define L2CAP_CONF_MASK 0x7f |
589d2746 | 205 | |
1da177e4 LT |
206 | #define L2CAP_CONF_MTU 0x01 |
207 | #define L2CAP_CONF_FLUSH_TO 0x02 | |
208 | #define L2CAP_CONF_QOS 0x03 | |
209 | #define L2CAP_CONF_RFC 0x04 | |
47ec1dcd | 210 | #define L2CAP_CONF_FCS 0x05 |
1da177e4 LT |
211 | |
212 | #define L2CAP_CONF_MAX_SIZE 22 | |
213 | ||
6464f35f MH |
214 | struct l2cap_conf_rfc { |
215 | __u8 mode; | |
216 | __u8 txwin_size; | |
217 | __u8 max_transmit; | |
218 | __le16 retrans_timeout; | |
219 | __le16 monitor_timeout; | |
220 | __le16 max_pdu_size; | |
66c853cc | 221 | } __packed; |
6464f35f MH |
222 | |
223 | #define L2CAP_MODE_BASIC 0x00 | |
224 | #define L2CAP_MODE_RETRANS 0x01 | |
225 | #define L2CAP_MODE_FLOWCTL 0x02 | |
47ec1dcd | 226 | #define L2CAP_MODE_ERTM 0x03 |
c6b03cf9 | 227 | #define L2CAP_MODE_STREAMING 0x04 |
6464f35f | 228 | |
1da177e4 | 229 | struct l2cap_disconn_req { |
8e036fc3 AV |
230 | __le16 dcid; |
231 | __le16 scid; | |
66c853cc | 232 | } __packed; |
1da177e4 LT |
233 | |
234 | struct l2cap_disconn_rsp { | |
8e036fc3 AV |
235 | __le16 dcid; |
236 | __le16 scid; | |
66c853cc | 237 | } __packed; |
1da177e4 LT |
238 | |
239 | struct l2cap_info_req { | |
8e036fc3 | 240 | __le16 type; |
66c853cc | 241 | } __packed; |
1da177e4 LT |
242 | |
243 | struct l2cap_info_rsp { | |
8e036fc3 AV |
244 | __le16 type; |
245 | __le16 result; | |
1da177e4 | 246 | __u8 data[0]; |
66c853cc | 247 | } __packed; |
1da177e4 LT |
248 | |
249 | /* info type */ | |
250 | #define L2CAP_IT_CL_MTU 0x0001 | |
251 | #define L2CAP_IT_FEAT_MASK 0x0002 | |
e1027a7c | 252 | #define L2CAP_IT_FIXED_CHAN 0x0003 |
1da177e4 LT |
253 | |
254 | /* info result */ | |
255 | #define L2CAP_IR_SUCCESS 0x0000 | |
256 | #define L2CAP_IR_NOTSUPP 0x0001 | |
257 | ||
258 | /* ----- L2CAP connections ----- */ | |
259 | struct l2cap_chan_list { | |
260 | struct sock *head; | |
261 | rwlock_t lock; | |
262 | long num; | |
263 | }; | |
264 | ||
265 | struct l2cap_conn { | |
266 | struct hci_conn *hcon; | |
267 | ||
268 | bdaddr_t *dst; | |
269 | bdaddr_t *src; | |
270 | ||
271 | unsigned int mtu; | |
272 | ||
4e8402a3 MH |
273 | __u32 feat_mask; |
274 | ||
275 | __u8 info_state; | |
276 | __u8 info_ident; | |
277 | ||
278 | struct timer_list info_timer; | |
279 | ||
1da177e4 LT |
280 | spinlock_t lock; |
281 | ||
282 | struct sk_buff *rx_skb; | |
283 | __u32 rx_len; | |
284 | __u8 rx_ident; | |
285 | __u8 tx_ident; | |
286 | ||
2950f21a MH |
287 | __u8 disc_reason; |
288 | ||
1da177e4 LT |
289 | struct l2cap_chan_list chan_list; |
290 | }; | |
291 | ||
cf6c2c0b GP |
292 | struct sock_del_list { |
293 | struct sock *sk; | |
294 | struct list_head list; | |
295 | }; | |
296 | ||
4e8402a3 | 297 | #define L2CAP_INFO_CL_MTU_REQ_SENT 0x01 |
984947dc MH |
298 | #define L2CAP_INFO_FEAT_MASK_REQ_SENT 0x04 |
299 | #define L2CAP_INFO_FEAT_MASK_REQ_DONE 0x08 | |
4e8402a3 | 300 | |
1da177e4 LT |
301 | /* ----- L2CAP channel and socket info ----- */ |
302 | #define l2cap_pi(sk) ((struct l2cap_pinfo *) sk) | |
1c2acffb | 303 | #define TX_QUEUE(sk) (&l2cap_pi(sk)->tx_queue) |
8f17154f | 304 | #define SREJ_QUEUE(sk) (&l2cap_pi(sk)->srej_queue) |
1890d36b | 305 | #define BUSY_QUEUE(sk) (&l2cap_pi(sk)->busy_queue) |
8f17154f GP |
306 | #define SREJ_LIST(sk) (&l2cap_pi(sk)->srej_l.list) |
307 | ||
308 | struct srej_list { | |
309 | __u8 tx_seq; | |
310 | struct list_head list; | |
311 | }; | |
1da177e4 LT |
312 | |
313 | struct l2cap_pinfo { | |
314 | struct bt_sock bt; | |
8e036fc3 | 315 | __le16 psm; |
1da177e4 LT |
316 | __u16 dcid; |
317 | __u16 scid; | |
318 | ||
319 | __u16 imtu; | |
320 | __u16 omtu; | |
321 | __u16 flush_to; | |
c6b03cf9 | 322 | __u8 mode; |
f2fcfcd6 GP |
323 | __u8 num_conf_req; |
324 | __u8 num_conf_rsp; | |
325 | ||
c6b03cf9 MH |
326 | __u8 fcs; |
327 | __u8 sec_level; | |
2af6b9d5 | 328 | __u8 role_switch; |
c6b03cf9 | 329 | __u8 force_reliable; |
1da177e4 | 330 | |
5dee9e7c MH |
331 | __u8 conf_req[64]; |
332 | __u8 conf_len; | |
1da177e4 | 333 | __u8 conf_state; |
d5392c8f | 334 | __u16 conn_state; |
1da177e4 | 335 | |
1c2acffb GP |
336 | __u8 next_tx_seq; |
337 | __u8 expected_ack_seq; | |
1c2acffb | 338 | __u8 expected_tx_seq; |
8f17154f GP |
339 | __u8 buffer_seq; |
340 | __u8 buffer_seq_srej; | |
ef54fd93 | 341 | __u8 srej_save_reqseq; |
d5392c8f | 342 | __u8 frames_sent; |
1c2acffb | 343 | __u8 unacked_frames; |
e90bac06 | 344 | __u8 retry_count; |
803020c6 | 345 | __u8 num_acked; |
c74e560c GP |
346 | __u16 sdu_len; |
347 | __u16 partial_sdu_len; | |
348 | struct sk_buff *sdu; | |
1c2acffb | 349 | |
1da177e4 LT |
350 | __u8 ident; |
351 | ||
14b5aa71 | 352 | __u8 tx_win; |
68d7f0ce | 353 | __u8 max_tx; |
f2fcfcd6 GP |
354 | __u8 remote_tx_win; |
355 | __u8 remote_max_tx; | |
356 | __u16 retrans_timeout; | |
357 | __u16 monitor_timeout; | |
1c762159 GP |
358 | __u16 remote_mps; |
359 | __u16 mps; | |
f2fcfcd6 | 360 | |
8e036fc3 | 361 | __le16 sport; |
1da177e4 | 362 | |
e90bac06 GP |
363 | struct timer_list retrans_timer; |
364 | struct timer_list monitor_timer; | |
c1b4f43b | 365 | struct timer_list ack_timer; |
1c2acffb | 366 | struct sk_buff_head tx_queue; |
8f17154f | 367 | struct sk_buff_head srej_queue; |
1890d36b GP |
368 | struct sk_buff_head busy_queue; |
369 | struct work_struct busy_work; | |
8f17154f | 370 | struct srej_list srej_l; |
1da177e4 LT |
371 | struct l2cap_conn *conn; |
372 | struct sock *next_c; | |
373 | struct sock *prev_c; | |
374 | }; | |
375 | ||
f2fcfcd6 GP |
376 | #define L2CAP_CONF_REQ_SENT 0x01 |
377 | #define L2CAP_CONF_INPUT_DONE 0x02 | |
378 | #define L2CAP_CONF_OUTPUT_DONE 0x04 | |
379 | #define L2CAP_CONF_MTU_DONE 0x08 | |
380 | #define L2CAP_CONF_MODE_DONE 0x10 | |
381 | #define L2CAP_CONF_CONNECT_PEND 0x20 | |
fcc203c3 | 382 | #define L2CAP_CONF_NO_FCS_RECV 0x40 |
f2fcfcd6 GP |
383 | #define L2CAP_CONF_STATE2_DEVICE 0x80 |
384 | ||
385 | #define L2CAP_CONF_MAX_CONF_REQ 2 | |
386 | #define L2CAP_CONF_MAX_CONF_RSP 2 | |
861d6882 | 387 | |
d5392c8f GP |
388 | #define L2CAP_CONN_SAR_SDU 0x0001 |
389 | #define L2CAP_CONN_SREJ_SENT 0x0002 | |
390 | #define L2CAP_CONN_WAIT_F 0x0004 | |
391 | #define L2CAP_CONN_SREJ_ACT 0x0008 | |
392 | #define L2CAP_CONN_SEND_PBIT 0x0010 | |
393 | #define L2CAP_CONN_REMOTE_BUSY 0x0020 | |
394 | #define L2CAP_CONN_LOCAL_BUSY 0x0040 | |
395 | #define L2CAP_CONN_REJ_ACT 0x0080 | |
396 | #define L2CAP_CONN_SEND_FBIT 0x0100 | |
1890d36b GP |
397 | #define L2CAP_CONN_RNR_SENT 0x0200 |
398 | #define L2CAP_CONN_SAR_RETRY 0x0400 | |
e90bac06 GP |
399 | |
400 | #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ | |
401 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); | |
402 | #define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ | |
403 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); | |
c1b4f43b GP |
404 | #define __mod_ack_timer() mod_timer(&l2cap_pi(sk)->ack_timer, \ |
405 | jiffies + msecs_to_jiffies(L2CAP_DEFAULT_ACK_TO)); | |
c74e560c | 406 | |
1c2acffb GP |
407 | static inline int l2cap_tx_window_full(struct sock *sk) |
408 | { | |
409 | struct l2cap_pinfo *pi = l2cap_pi(sk); | |
410 | int sub; | |
411 | ||
412 | sub = (pi->next_tx_seq - pi->expected_ack_seq) % 64; | |
413 | ||
414 | if (sub < 0) | |
415 | sub += 64; | |
416 | ||
a02cec21 | 417 | return sub == pi->remote_tx_win; |
1c2acffb GP |
418 | } |
419 | ||
420 | #define __get_txseq(ctrl) ((ctrl) & L2CAP_CTRL_TXSEQ) >> 1 | |
421 | #define __get_reqseq(ctrl) ((ctrl) & L2CAP_CTRL_REQSEQ) >> 8 | |
422 | #define __is_iframe(ctrl) !((ctrl) & L2CAP_CTRL_FRAME_TYPE) | |
423 | #define __is_sframe(ctrl) (ctrl) & L2CAP_CTRL_FRAME_TYPE | |
c74e560c | 424 | #define __is_sar_start(ctrl) ((ctrl) & L2CAP_CTRL_SAR) == L2CAP_SDU_START |
1da177e4 LT |
425 | |
426 | void l2cap_load(void); | |
427 | ||
428 | #endif /* __L2CAP_H */ |